Messages in this thread |  | | From | Daniel Phillips <> | Subject | Re: [PATCH] Initial support for struct vfs_cred [0/1] | Date | Sun, 1 Sep 2002 17:15:30 +0200 |
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On Sunday 01 September 2002 01:13, Luca Barbieri wrote: > On Sun, 2002-09-01 at 00:30, Trond Myklebust wrote: > > >>>>> " " == Luca Barbieri <ldb@ldb.ods.org> writes: > > > > > Then the rest of the code doesn't need to know at all that > > > credentials are shared and is simpler and faster. We have > > > however a larger penalty on credential change but, as you say, > > > that's extremely rare (well, perhaps not necessarily extremely, > > > but still rare). > > > > What if I, in a fit of madness/perversion, decide to use CLONE_CRED > > between 2 kernel threads (i.e. no 'kernel entry')? > You don't or you manually patch the task_struct of the other threads. > This isn't a serious concern.
It is a serious concern. Inventing new, subtle behavior differences between user and kernel threads is, in a word, gross. It's certain to bite people in the future.
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